... maximum values of Eqs. (26) and (27) subject to the constraint of Eq. (25). The control variable is '21' 2'/TTTT≡, and the inequality 11'2'2TTT T>>> always ... based on the condition that the total equivalent thermal conductance is a constant. This condition is very strictly, which is due to that the total equivalent thermal conductance is a function of ... Eq. (A7), one can see that H contains the variable τ inexplicitly, and the equation //dH d Hτ τ=∂ ∂ holds for the Hamilton function, so the Hamilton function is autonomous and 1max1(,...